The .693 insert is for a "rain barrel", where I use an extra tip with the ports taped up. It allows me to switch between inserts/tips and not worry about it affecting me on the chrono as much. Day to day, I mostly use the .682 and .684.

I've never seen a tip really affect anything in game. Meaning your not going to be able to tell a difference while playing. Personally go with a tip that you like the look of best.
I found that my AA tip was a bit louder then the stock tip, but that just IMO.

I've never seen a tip really affect anything in game. Meaning your not going to be able to tell a difference while playing. Personally go with a tip that you like the look of best.
I found that my AA tip was a bit louder then the stock tip, but that just IMO.